package com.lb.activity.util;

public class Test {
    public static void main(String[] args) {
        System.out.println(System.currentTimeMillis());
       Long sum = 0L;
       for(int i = 0;i<Integer.MAX_VALUE;i++){
           sum+=i;
           //System.out.println(sum);
       }
        System.out.println(System.currentTimeMillis());
    }
}
